The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 05, 2021
Filed:
Oct. 30, 2019
SK Hynix Inc., Gyeonggi-do, KR;
Yo-Sep Lee, Gyeonggi-do, KR;
SK hynix Inc., Gyeonggi-do, KR;
Abstract
A stacked semiconductor device includes semiconductor chips, each including a signal transfer circuit respectively transferring a command, an address, and a chip select signal to first to third through electrodes, and respectively transferring a test address and a chip ID to the second and third through electrodes according to a test control signal; a command reception circuit transferring a test command or a signal transferred from the first through electrode to an internal circuit when a signal transferred from the third through electrode is identical to the chip ID coincide with each other; and a test control circuit activating the test control signal according to deactivation of a test control signal of an upper chip, and generating the test command and the test address according to the test control signal.